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Item
Symptom
No.
Cannot monitor
communication
Cause
1
Is the sound volume switch
OFF?
2
Is S/W DIP SW set line mon-
itoring?
3
Any improvement after
replacing the speaker?
4
Any improvement after
replacing FAX1 board?
5
Any improvement after
replacing MFB2 board?
6
Any improvement after
replacing AOP board?
7
Any improvement after
replacing the cable between
AOP and MFB2?
T-16
Remedy
Select a sound volume switch
YES
other than OFF.
NO Go to item 2
YES Go to item 3.
NO Set S/W DIP SW.
YES Replace the speaker.
NO Go to item 4.
YES Replace FAX1 board.
NO Go to item 5.
YES Replace MFB2 board.
NO Go to item 6.
YES Replace AOP board.
NO Go to item 7.
Replace the cable between
YES
AOP and MFB2.
NO Replace the PWB-A
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